Английский для сварщиков. Гричин С.В. - 97 стр.

UptoLike

Составители:

Рубрика:

9. Существенным недостатком данного метода является быстрый износ

инструмента.

10. При сваривании стальных конструкций сталь раскаляется докрасна.

Make a short description of the method using the following key words:

Fusion, filler material, aluminium and its alloys, plates and sheets, frictional

heating and mechanical deformation, rotating tool, tool, shoulder, pin, work

piece, heat generation, microstructure of a friction-stir weld, applied pressure,

characteristics of the material, withdrawal of the tool, onion-ring structure,

HAZ, integral weld.

Vocabulary

hermal (heat) ageing термостарение

bending test испытание на изгиб

tensile (tension) test испытание на растяжение

HAZ heat affected zone зона термического влияния

butt joint стыковое соединение; соединение встык

Abutment торец; упор; опора,

Backing опора

Reading

Read the text below and say what new facts you learn from it.

Text 2. New Welding Method for Aluminium

Friction welding has been used in the manufacture of rotating bodies

since 1956 and has become well-known as an extremely rapid and reliable

method. Unfortunately, its use has been limited to rotationally symmetrical

bodies, as friction welding is based the principle of rotating two workpieces

at high speed in relation to one another and then pressing them against once

another with great force, thereby rapidly obtaining forging temperatures. As

this method makes high productivity possible, the opportunity to use friction

welding for other types of object has been eagerly awaited for many years.

Aluminium is normally welded using MIG, TIG, plasma or manual

welding with coated electrodes. A new welding method, Friction Stir

Welding, has been developed for welding aluminium. This method has been

patented and developed by TWI. The necessary expertise has been acquired